San Antonio Weather Forecast

    • 48
    • 76

    Chance Thunderstorms

    • 50
    • 69

    Rain Showers

    • 46
    • 70

    Rain Showers

    • 43
    • 71

    Rain Showers Likely

    • 41
    • 71

    Chance Thunderstorms

    • 40
    • 70

    Chance Thunderstorms

Today 15 Sep Southern San Luis Valley

Partly sunny with a 30 percent chance of Thunderstorms. Patchy fog. Highs 71 to 78. Light Winds becoming south 10 to 15 Mph in the afternoon.

Tonight 15 Sep Southern San Luis Valley

Mostly cloudy with chance of rain Showers and slight chance of Thunderstorms. Lows near 50. South Winds 10 to 15 Mph. Chance of precipitation 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

San Antonio Temperature Statistics

September Temperature

San Luis Valley Regional Airport (29.8 miles)

  • Lowest 11 September, 2026

    36 °F

  • Average September

    65.3 °F

  • Highest 6 September, 2026

    87.7 °F

Climate (2021–2026)

San Luis Valley Regional Airport (29.8 miles)

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  • Average Low 2021–2026

    26.8 °F

  • Average 2021–2026

    45.2 °F

  • Average High 2021–2026

    63.5 °F
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